Car bumper provided with energy absorption and pedestrian protection device

Abstract

The invention discloses a car bumper provided with an energy absorption and pedestrian protection device. Collision energy is dispersed and consumed by adopting a rhombus-shaped mechanism and a damping unit; and the rhombus-shaped mechanism is used for transmitting energy in a collision process into a transverse direction so as to reduce the vertical impact force between a pedestrian and a car body. Meanwhile, the deformation of the rhombus-shaped mechanism can provide a certain safe buffering distance for the collision process to prolong the collision contact time and reduce the magnitude of collision force. The energy decomposed by the rhombus-shaped mechanism is transmitted to the damping unit, and the kinetic energy is converted into heat energy through the relative movement of the damping unit; and finally, the collision energy is consumed. Therefore, the collision force can be decomposed, the collision energy is consumed, the collision contact time is prolonged, the stress of people and the car in the collision process is improved, and further, the safety of people and the car is protected to the greatest extent.

Description

technical field [0001] The invention relates to an automobile bumper, in particular to an automobile bumper with the function of dissipating collision energy. Background technique [0002] Traffic accidents are one of the important causes of human and property losses. How to fully protect pedestrians during a collision is one of the important factors to be considered in bumper design. At present, bumper designs have the following forms: bumpers made of polymer and plastic materials; bumpers with energy buffering functions made of elastic structures; bumpers with energy decomposition or transmission functions using hydraulic or pneumatic technology ; and bumpers with active or semi-active controls. [0003] Traditional automobile bumpers mostly adopt the first two designs, that is, they are made of materials such as elastic materials or plastics. The bumper, made of plastic, is a one-piece component that deforms or crushes during impact and has a certain degree of energy a...

AI Technical Summary

Problems solved by technology

However, this solution directly connects the magneto-rheological damper between the driver and the bumper, which has a small movement displacement during a collision, so it cannot provide sufficient movement range

The patent (200910072399.3) proposes a bumper based on shape memory materials, which can be restored to its original shape by heating after a collision, so maintenance costs can be saved, but the system requires heating and requires a large amount of energy for the system; Metal material, high modulus of elasticity, not conducive to energy dissipation

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